One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,8)(5,6)(9,10,13,12)(11,14,16,15)(17,18,21,24)(19,26,27,23)(20,28,30,32)(22,31,29,25)(2,6)(7,8)(9,11)(10,14)(12,15)(13,16)(17,19)(18,23)(20,29)(21,27)(22,30)(24,26)(25,32)(28,31) involution — undirected(1,3,5,4)(2,7,6,8)(9,12,13,10)(11,15,16,14)(17,20,22,27,21,30,29,19)(18,23,25,28,24,26,31,32)(11,16)(14,15)(17,20,29,19,21,30,22,27)(18,23,31,32,24,26,25,28)(1,4,5,3)(2,7,6,8)(18,24)(23,26)(25,31)(28,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.